Mr Miller trained in ophthalmology at Middlesex Hospital London, St Thomas's Hospital London and Moorfields Eye Hospital. he had two periods of research at the Institute of Ophthalmology in London where his contributions to ophthalmic surgery were awarded an MD in 1988. His research also contributed to the development of imaging system in glaucoma.
Mr Miller was appointed as a consultant ophthalmologist to Moorfields Eye Hospital in 1992 working within the Cataract and Glaucoma Services. He is currently working as an Honorary Consultant Surgeon at Moorfield Eye Hospital.